Goodreads - See what your friends are reading.
Booker.io - Booker is a networked book discovery platform to help people find must read book through people...
LibraryThing - A home for your books.
BookLikes - BookLikes is a free blog platform for book lovers. 100% independent and free.
Read This Twice - Verified book recommendations from people we look up to
Riffle - Just good books and the readers who love them.